Method of forming frames for metallic screens



Aug. 12, 1930. J. MILONE METHOD OF FORMING FRAMES FOR METALLIC SCREENS-Filed Dec. 24, 1927.

INVENTOR 22% By Attorneys ture.

'tion of solid metal.

atented Aug. 12, 1930 UITED STATES LQUIS 3. MILONE, 0F NEWARK, NEWJERSEY, ASSIGNOB '10 ORANGE SCREEN COMPANY,

OF MAFLEWOOD, NEW JERSEY, A CORPORATION OF NEW JERSEY METHOD 0! FORMING-FBAMES FOR METALLIC SCREENS Application filed December 24, 1927. SerialNo. 242,491.

This invention relates to metallic screens for windows, doors, and thelike, of the type set forth in the patents to Arthur L. Otto,

Reissues No. 16,148 and No. 1,596,507. In

this type of screen the frame is formed of rails and stiles constructedof extruded aluminum or similar metal, and formed during the process ofextrusion with screen-recelving channels in the sides thereof, and guidegrooves'in the edges thereof. In the use of such extruded metal forwindow screens, the top and bottom sections do not require guidegrooves, these being, in fact, detrimental, since they collect dust anddirt and interfere with the smooth and finished appearance of thescreens. The same is true'of metallic doors and screens which aredesigned to r0- tate about a hinge or pivot rather than to slide inguides. For these purposes it has been proposed to omit the groove inthe section, thus forming the major part of the sec- IVhile providingthe proper finish this results in a screen which has unnecessary weightand strength, and which is consequently more expensive to manufac- Ithas also been proposed to extrude such sections with the body of thesection in 4 the form of a closed tube, but such sections do not lendthemselves to practical extrusion processes. The third method of closingsuch unnecessary grooves is to provide filler pieces which are eitherforced into the grooves or otherwise held in place, but such pieces alsoinvolve unnecessary expense and labor.

According to the present invention I extrude such sections in what maybe said to be tubular form with the shape sufiiciently open to supportan extrusion die through the slot thus provided, and after formation Iclose the slot by running the section through a. closing roll, or in anyother suitable manner, so that the previously opened flanges are closedtogether with a single joint which can be made Figure 1 is a view of adetailof a metallic sufiiciently accurate so that the resultantappearance of the edge of the section is that of a closed section.

Referring to the drawings which illustrate several forms of theinvention:

screen of the type referred to showing one form of the finished product.

Fig. 2 is a cross-section of the product on a scale which is enlarged ascompared with Figure 1.

Fig. 3 is a cross-section of the form shown m Fig. 2, as the latterleaves the extrusion press.

dFig. 4 is a modified form having a round e e.

ig. 5 is a view of the section of Fig. 4 as extruded.

Fig. 6 is a cross-section of the form shown in Fig. 2 as extruded andshows a slightly-different method of production.

Fig. 7 is a section of a die and its supporting block, such as may beused in extruding the section of Fig. 3.

Referring first to Fig. 1, let A designate the top or bottom sectionot ametallic screen .of the type set forth in said prior patents, and

B one of the side sections. Both of the sections A and B are formed witha screen-retaining channel 0 in which the edges of the invention, formedwith a hollow interior such as E, which usually approximates the size ofthe groove in section B. In the case of the section A, however, thisgroove is closed by a portion F or its equivalent, which in theparticular form now bein described is a continuation of the lower flange G of the section bent around until it meets the upper flange H. Inextruding this articular section the extruding dies are so formed as toproduce a. structure similar to that shown in Fig. 3, wherein theportion F instead of extending at right angles to the lower side G, isformed at a more oblique angle, thereby leaving a space I between thetwoflanges. This space I permits the adequate support of the extruding diein the process so that no difiiculty is had during the extrudingoperation, while at the same time it lends itself readily to completeclosure in finished form after the extrusion operation. Fig. 7illustrates a cross-section of a die block which may be used inextruding the section of Fig. 3. In this figure M indicates the dieblock, N the die element which results in the space between the flangesG and H, and 0 indicates the support for this die. It will be observedthat in extruding the two flanges G and H lie on either side of the diemember support 0. Figure 7 illustrates a conventional type of die, whichmay be varied from, but. in any event while the actual extrusionoperation is taking place the shape must be that which will permit thesupport for the die member to pass between the flanges. When theextrusion operation is completed so that the metal has been fullyformed, the flanges may be closed in any well known manner. The degreeof opening or separation of flanges may be that desired, but it isobvious that the greater the opening the greater bend the metal will berequired to take during the closing operation. Hence, while notexcluding wider separation of the flanges than that shown, I prefer tomake this separation as small as practicable. This is particularly truein a case where the edge of the section in its final form is to be atright angles to the remainder of the section, since in closing thesection it is diflicult, if not impossible, to support the structurefrom the inside so as to make a sharp bend. Hence, in this case,particularly if the corner edge J can be practically completely formedduring extrusion, the resultant appearance of the article after bendingis much improved. In Fig. 4 I have shown a construction in which theflanges G and H are both bent toward each other in curved form, such asection being well adapted for use in a screen or do'orwhich is hingedon top and bottom pivots as distinguished from outside or surfacehinges.

Fig. 5 illustrates an appropriate form for extruding the section of Fig.4C, the top and bottom flanges being given an original curve during theextruding operation, which facilitates bending to produce thesymmetrical edge shown in Fig. 4.

Fig. 6 is another modification showing a method of extruding the sectionof Fig. 2,

wherein me upper flange H is elevated and the lower flange G andvertical flange F are originally formed at right angles to each other.

While I have shown and described several forms ofthe invention, it willbe understood that I. do not wish to be limited thereto, since variousmodifications may be made therein without departing from the spirit ofthe invention.

What I claim is:

1a The method of producing a. section for a metallic screen frame or thehke,'which comprises extruding such a section by means including anexteriorly supported d e member, the section being formed with separatedflanges one on either side of the die member support and subsequentlybending the flanges into closed form.

2. The method of producing a section for a metallic screen frame or thelike, which comprises extruding such a section with a. partially closedform, and subsequently clos- 111 it.

The method of producing a section for a metallic screen frame or thelike, which comprises extruding a section having a screen-retainingchannel in its side and a partially completed tubular portion at itsedge, and subsequently bending the metal to complete the tubular form.

4. The method of producing a section for a metallic screen frame or thelike, which comprises extruding a section having a screen=retainingchannel in its side, a flange on one face and a flange on the oppositeface, the latter being provided with an extension joined to it at anangle, and subsequently bendingsuch extension to substantially meet thefirst-named flange.

5. The method of producing a section for a metallic screen frame or thelike, which comprises extruding a section having flanges ofsubstantially uniform thickness and subsequently bending said flanges.

6. The method of producing a section for a metallic screen frame or thelike, which comprises extruding a section by means including anexteriorly supported die member, said section having flanges ofsubstantially equal width, said flanges being located on either side ofthe die member support and subsequently bending said flanges to producea curved exterior.

7. A section for metallic screens or the like formed of extruded metaland having a hollow'\, edge portion, such edge portion being.

formed of two flanges, the edges of which lie close together tosubstantially close such hollow portion, and at least one of saidflanges being bent to effect such substantial.

closing.

8. A section for metallic screens or the like formed of extruded metaland having a 1101- low edge portion, such edge portion bein formed oftwo flanges, at least one of said flanges beingbent to substantiallyclose such hollow portion, and said section having on one side ascreen-retaining channel.

9. A section for metallic screens or the like formed of extruded metaland having a hollow edge portion, such edge portion bemgformed of twoflanges, one of which 1s w1der than the other, and is connected with theface of the section by a right angled bend, the ,edge of such flangelying along the ed e of he opposite flange so as to substantia yclosesin hollow portion.

10, A section for metallic screens or the like formed of extruded metaland having a hollow ed e gortion, such edge portion being forme 0 twoflanges, such flanges bein of substantially equal width, the edges of wich lie alongside of each other so as to substantially close said hollowportion.

11. A section for metallic; screens or the like formed of extruded metaland having a hollow edge portion, such edge portion being. formed of twoflan es and at least one of said flanges being angu arly bent tosubstantially close said hollow portion.

In witness whereof I have hereunto signed my name.

LOUIS J. MILONE.

